1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Sergeu [11.5K]
3 years ago
8

How do Archaeologists use fossils?

Chemistry
2 answers:
mihalych1998 [28]3 years ago
5 0
An archaeologist has to know the difference between artifacts and fossils. (it’s important because archaeologists don’t look for fossils) fossils are the remains of living things (people, plants, animals)
STatiana [176]3 years ago
3 0
To learn about the beings of history
You might be interested in
What pressure will be produced when 2.0 moles of N2 gas is heated to 68oC in a container that holds 1.25 of gas?
Stella [2.4K]

The pressure of the nitrogen gas produced is determined as 44.77 atm.

<h3>What is the pressure of the Nitrogen gas?</h3>

The pressure of the nitrogen gas is determined from ideal gas equation, as shown below;

PV = nRT

P = nRT/V

where;

  • n is number of moles = 2 moles
  • R is ideal gas constant = 0.08205 L.atm/mol.K
  • T is temperature = 68⁰C = 68 + 273 = 341 K
  • V is volume = 1.25 L

P = (2 x 0.08205 x 341)/(1.25)

P = 44.77 atm.

Learn more about pressure here: brainly.com/question/25736513

#SPJ1

3 0
2 years ago
A scientist experiments ima unknown solution. She notices that when a base, sodium hydroxide, is added to the solution, it forms
Lelechka [254]
The unknown solution is acidic
8 0
3 years ago
Read 2 more answers
If the molar absorptivity constant for the red dye solution is 5.56×104 M-1cm-1, calculate the molarity of the red dye solution
Shtirlitz [24]

Explanation:

a) Using Beer-Lambert's law :

Formula used :

A=\epsilon \times c\times l

where,

A = absorbance of solution = 0.945

c = concentration of solution = ?

l = length of the cell = 1.20 cm

\epsilon = molar absorptivity of this solution =5.56\times 10^4 M^{-1} cm^{-1}

0.945=5.56\times 10^4 M^{-1} cm^{-1}\times 1.20 \times c

c=1.4163\times 10^{-5} M=14.16 \mu M

(1\mu M=10^{-6} M)

14.16 μM is the molarity of the red dye solution at the optimal wavelength 519nm and absorbance value 0.945.

b) c=1.4163\times 10^{-5} mol/L

1 L of solution contains 1.4163\times 10^{-5} moles of red dye.

Mass of 1.4163\times 10^{-5} moles of red dye:

1.4163\times 10^{-5}\times 879.86g/mol=0.01246 g

(w/v)\%=\frac{\text{Mass of solute (g)}}{\text{Volume of solvent (mL)}}\times 100

red(w/v)\%=\frac{0.01246 g}{1000 mL}\times 100=0.001246\%

c) In order to dilute red dye solution by 5 times, we will need to add 1 L of water to solution of given concentration.

Concentration of red dye solution = c=1.4163\times 10^{-5} M

Concentration of red solution after dilution = c'

c=c'\times 5

1.4163\times 10^{-5} M=c'\times 5

c'=2.83\times 10^{-6} M

The final concentration of the diluted solution is 2.83\times 10^{-6} M

8 0
3 years ago
What will the ph be in a titration of acetic acid and sodium hydroxide that is half way to equivalence point ?
ASHA 777 [7]
It would be 7 because the acid and base cancel out each other
8 0
3 years ago
B. MgF2<br> Name the compound
algol [13]

Answer:

Magnesium Difluoride

Explanation:

Mg = magnesium

F = fluoride

F2 = difluoride (prefix "di" indicates 2)

5 0
3 years ago
Other questions:
  • How can a atom help you see both unity and diversity
    7·1 answer
  • How many covalent bonds are in a nitrogen molecule?
    10·1 answer
  • Name the ketone with a five carbon group on the right and a two carbon group on the left. View Available Hint(s) Name the ketone
    14·1 answer
  • Since acids have 1 more proton (H+ - ions) than base, and the acid gives it away, doesn't that mean that they switch roles? Acid
    13·1 answer
  • Which landscape is located at 42°N 75° W
    8·1 answer
  • There are three ways in which heat be transferred - conduction, convection, and radiation. Which types of thermal transfer invol
    7·1 answer
  • In the reaction of 3NO2 + H2O + NO + 2HNO3, if 6.0 moles of NO2 are present how many moles of NO are produced?
    14·1 answer
  • How many lone pairs are on the central atom in GeH4?
    12·1 answer
  • I will take a picture of the question ​
    7·1 answer
  • Question: How does mass and volume affect sinking and floating?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!